I am not sure this is freezer is really in need of repair or not but....
We purchased this 14.1 Cu Ft upright approx 2 months ago. Ice cream placed in the lower basket didn't seem very firm, so I placed a thermometer inside and adjusted the temp so it read 0F or just under. When I open the door to check the temp. and it sometimes reads 10F. A half hour later I will recheck and the temp is down to 0F. Why would a freezer have such temp. variations and will this affect the quality of the food. Obviously this happens during cycling, but since this is NOT a frost free model, I would think it would have a more stable temp reading at all times.
Could this be a coolant issue or just my paranoia? I am not that familiar with uprights as we had a chest before and it seemed quite stable temp. wise.
Thanks!

The freezer is not at capacity but has plenty of food inside. Not a lot of frost build up at all.
Door seals very good.

That all sounds ok, Freezer have a larger temperature swing than a refrigerator will usually about 10 degrees. So, what is the temp control set at?